Open AccessModification of aluminium and aluminium alloys by AL-B master alloy
Author(s) -
Khanh Cong Huynh,
Luc Hoai Vo
Publication year - 2014
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v17i2.1315
Subject(s) - aluminium , materials science , metallurgy , cryolite , 6063 aluminium alloy , titanium , boron , zirconium , alloy , microstructure , aluminium powder , 5052 aluminium alloy , 5005 aluminium alloy , nucleation , vanadium , aluminium alloy , 6111 aluminium alloy , chemistry , organic chemistry
Chemical compositions and microstructures affect on mechanical – physical and working properties of aluminium and aluminum alloys. Transition elements, such as Ti, V, Cr, Zr in solid solution greatly reduce the electrical conductivity of aluminium and its alloys. For reduction of detrimental effects of transition elements, Al-B master alloys are added into molten aluminium to occur reactions of boron and transition elements to form diborides of titanium, vanadium, chromium and zirconium, which are markedly insoluble in molten aluminium, then these transition elements have an insignificant effects on conductivity. In addition, Al-B master alloys is also used as a grain refiner of aluminium and aluminium alloys. Aluminium borides particles in Al-B master alloys act as substrates for heterogeneous nucleation of aluminium and its alloys. Al-B master alloys are prepared from low cost materials, such as boric acid H3BO3 and cryolite Na3AlF6, by simple melting method, easily realize in electrical wire and cable factories.